Of course you own it

If you walked into a store (or virtual equivalent) and bought it, you own it. End of story. Anybody who tells you otherwise is just trying to scam you. Copyright, as the name would indicate, has something to do with the right to make copies. But once you make a copy and sell it, you don't have any control over how someone uses it. Some would argue that by it's nature using computer software constitutes copying it (to memory, etc), but courts have ruled that you ARE allowed to copy something for personal use.